Anatomy of a South African Karst HydrosystemPhilip J. Hobbs, Harrison Pienaar, Eddie van Wyk, Yongxin Xu · First published 2022Open the Tome
Socialist welfare in a market economyZhou, Yongxin, Nelson Chow, Yeubin Xu · First published 2001Open the Tome
Sustainable Groundwater Resources in AfricaYongxin Xu, Eberhard Braune · First published 2009Open the Tome
